Presser-foot-lifting mechanism



(NoModeL) G. P. HARLOW & E. E. ANGELL.

PRESSER FOOT LIFTING MECHANISM.

No. 350,304. Patented opt. 5, 1886 a E s s E N T m w M G K L M w UNITEDSTATES PATENT OFFICE.

oHAELEs E. IIAELOWAND EDWIN E. ANGELL, 0F MALDEN, AssIGNOEs TO THE GLOBESEWING MACHINE OOMPANY, OF BOSTON, MASSACHUSETTS.

PRESSER-FOOT-LlF'l'lNG MECHANISM.

SPECIFICATION forming part of Letters Patent No. 350,304, dated October5, 1886. Application filed October 12, 1885. Serial N 0. 179,674. (Nomodel.)

To all whom it may concern.-

Be it known that we, CHARLES F. HARLOW and EDWIN E. ANGELL, both ofMaiden, in the county of Middlesex and State of Massa- 5 chusetts,havejointly invented a new and useful Improvement in Presser-Foot-Lifting Mechanism for Sewing-Machines, of which the following, taken inconnection with the accompanying drawings, is a specification.

, Our" present improvement relates to a relief mechanism by means ofwhich the pressure of the presser-foot in a sewing-machine is taken offat a certain point in each stitch, ifdesired.

This invention is particularly useful-in such 1 machines as are employedin sewing straw braid in hat manufacture, 82c.

In the drawings, Figure 1 is a perspective View of part of asewing-machine. provided with our improvement, and Fig. 2 is an end 20elevation thereof.

The presser-bar O has a sleeve, T, surrounding and fixed upon its upperpart, with a pro;-

jection, T, upon which a spring, U, bears to give the desired downwardpressure to the 25 presser-foot. When sewing braid in the hat- -crown,or elsewhere, where short curves are made, it is desirable to turn thework while theneedle is passed through it. To do this we relieve thepressure of the spring U at the o desired moment by forming a l'ug, W,on the sleeve T, and lifting said lug and sleeve and presser-barautomatically by a lever, V V, pivoted in the overhanging arm X of themachine, as shown where broken away in Fig. 1.

5 The long end V of this lever is between the arm X of the frame and thevibrating needlelever Y, and at each stroke such arm V is acted onautomatically by a dog, Z, carried on the arm Y, which strikes said endas the needle is depressed, causing vthe short arm V to lift the sleeveT, presserbar O, and presser-foot. When desired, this action may besuspended by turning the dog by a knob, Z, so as not to strike the leverend, as will be apparent from Fig. l.

The dog Z and knob Z are connected-by a stem passing through theneedlelever Y with sufficient friction to hold said knob and dog in anyposition to which they may be adjusted; or any Well-known friction orsecuring device may be provided for holding said dog in or out of itsoperative position.

WVe claim as our joint invention- The combination, with the presser-barO and the sleeve T, having the projection or arm T and the lug W, of thespring U, pressing on said arm or projection, the presser-bar-operatinglever V V, the stationary arm X, to which said lever is pivoted, thevibrating needle-lever, and the dog Z, pivoted to the latter and adaptedto be moved into or out of engagement with the saidpresser-bar-operating lever, substantially as set forth.

In testimony whereof we have signed our names to this specification, inthe presence of two subscribing witnesses, on this 8th day of October,A. D. 1885.

CHARLES F. HARLOW.

EDWIN E. AN GELL.

Witnesses:

A. H. SPENOER, O. G. KEYEs.

